cos(x)=-0.814

Lösung

cos (x) = - 0.814

x = 2.52180 \dots + 2 πn, x = - 2.52180 \dots + 2 πn

Grad

x = 144.48860 \dots^{\circ} + 36 0^{\circ} n, x = - 144.48860 \dots^{\circ} + 36 0^{\circ} n

Schritte zur Lösung

cos (x) = - 0.814

Wende die Eigenschaften der Trigonometrie an

cos (x) = - 0.814

Allgemeine Lösung für

cos (x) = - 0.814

cos (x) = - a \Rightarrow x = arccos (- a) + 2 πn, x = - arccos (- a) + 2 πn

x = arccos (- 0.814) + 2 πn, x = - arccos (- 0.814) + 2 πn

x = arccos (- 0.814) + 2 πn, x = - arccos (- 0.814) + 2 πn

Zeige Lösungen in Dezimalform

x = 2.52180 \dots + 2 πn, x = - 2.52180 \dots + 2 πn

3 cos^{2} (x) - 8 cos (x) + 4 = sin^{2} (x)

cos (x - 4 5^{\circ}) = \frac{- 1}{2}

so l v e f or x, sin (x + \frac{r}{4}) + sin (x - \frac{r}{3}) = 0

cos^{2} (x) = 2 sin^{2} (x)

so l v e f or x, sec (x) - sin (50 o) = 2